Oil burner and liquid fuel inlet therefor



Dec. 28, 1943.

J. L. BREESE OIL BURNER AND LIQUID FUEL INLET THEREFOR Filed July ll,1941 8 72 /3 67 l WH I Lk 'e soloeeeeo/eeeeeoeeoooo O 0 D O 7 .7

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Foa/WM Adelivering yfueltothebottomtoilthepot.

herein shown I illustrate an upwardly extending 4 Patented Dec. 28, 1943Y l UNITED STATES PATENT OFFICE; l'

l I I v James L. Santa-Fe, N.'Mex.,xasslgnor to i! Devldes. sul Fc, N.Mex., a limited partnership oflillnois z claims. (cuss-91) My inventionrelates to improv xn'eans-forfl liqufueltoapottypeburnerp. Onepurpeforsiipplyingtheprimaryairwiththefuelat, thepilot stagelof the burner.

Jinotherpurposeistheprovisionofmeansem.-

`tbeprovisionofimprovedmeans 4 'pioyabiewitntnepiiotbmeinapottypebumerwhere the bame is set below the normal primary airsupplyto'tbeburnerforsupplyingallofthev primary air necessary for the .pilot stage thefuel inlet duct. l

Other purposes will appearfrom time-to time in the course of tbespeciilcation.

I illustrate my invention more or less diagrammaticaliy in theaccompanying drawing wherein:` 1.',

Fig. 1 is a vertical axial section; and 'Figa Zisasectionon the line2-.2 ofFigrl.

Like parts are indicated by like symbols throughout the speciilcationand drawing.`

Referring to the drawing, I indicatesa base member or drum, which may beupwardly extended, as at 2, to forma radiating or combustion chamber. 3are any suitable supporting means therefor. 4 is a bottom member with anaxial air inletl. I is a supporting angle ring adapted to receive theupper flange 8 ofa burner pot 1. 'I'he pot has a slightly upwardlyconcave bottomI, and is provided with a plurality of primary air inletapertures III located at various levels in the wall of the pot. Anysuitable means may be employed for supplying secondary air to o radjacent the top of the pot. I illustrate for example a number of largerand more closely spaced secondary air inlet apertures II.

I2 is any suitable name ring having a central. 3.5

aperture I3. Il is a liquid fuel supply lineexftending to any suitablesource of fuel not herein shown. I6 generally indicates a manuallycontrollable valve.

* It will be understood that I may employ any suitable means. manual orautomatic, for controlling or varying the rate of supply :oi liquid Inthe form downwardly turned end portion I8. It willbe understood.however.v that the size, proportion and location of the end of the pipeIl may be substantially varied. I ilnd the present form emcient.however. as supplying the liquidiuelsndwitnit'smeprimryurtomecenrprthebottoinofthepot.V A

The primary air necessary for at the pilot stage may be supplied, forexample. birl the upwardly extending air inlet member Il, which is incommunication with the liquidfuel :niet pipe n, as foi-'exampleuytne'upung ze.'

I may employ a pilotring 2l, mounted on any suitable supports air tosupport-combustion at the pilot stage. A

The burningrate is controlled by controlling the supply of liquid fuel,and when the valve Ii or equivalent means is set to supply a minimum orpilot volume of fuel, all the air 'necessary-,for

combustion below the pilot ring 2l enters through the inlet Iaand alongthe pipe I1 with the fuel.

At such stage the pilot ring 2l serves -to prevent down drafts from theupper portion 'of the pot. which would disturb the balance ofcombustionin the area below the pilot ring, and a low ilarneV is maintained withaminimum deposit of free carbon.'

It will be realized device, nevertheless many changes may be made in thesize, shape, number and disposition of parts without departing from thespirit oi my invenf base I andthe pot l. The use and operation of myinvention are as follows: f In pot'type burners a low turndown This lowturndown may be obtained'by providing, in effect, a duplexburner with apilot baille in a lower part of the pot. I employ the baille 2|, whichis located below thelowest 'of the apertures I0 in the` pot wall. Theapertures III serve 5 as primary air inlet apertures for, the fullcombustion stage, the secondary air -being supplied by the upperapertures II, the combustion at,

` the high stage taking place ator above4 the v ring I2.-centerofthecentral-axisofthepotandhasa It will be understood that in aso-called 'hydroxylating burner the primaryair combineswith thehydrocarbon vaporized by the heat ofcombustion to form a mixture. whichin tum is finally l burned after it receives a supply of secondary air;

When the burner is operated at' low or pilot stage.v

suohas pins Il,

below the lowest row of primaryair inlets Il in the sidewall of the pot1.. -It winne-understood -that I supply throughthe passage Il sumcientfthat-whereas I have.de\\ .Y scribed and illustrated a practicaljandoperative is desirable.

Y the ring 2l.

- above the level of the ring 2 l ring 2|. For the pilot stage I preferto supply the primary air along-the d uct l1, which also serves as ,anoil delivery. duct. The passage duct' is of'sulcient cross sectionalarea to admit suilicientv primary air to support combustion at o aboutthe level of the ring 2l Atthe pilot stage sufficient fuel may besupplied by the control means diagrammatically shown at I5 to'maintainpilot combustion at the level of sufficient gauge or cross sectionalarea to admit all the primary air necessary for the hydroxylation of themixture. The fuel flowing in along the inlet or nozzle I1, in--thepresencefofthe air admitted through the pipe I9, is subjected tothe Theinlet [9 and the pipe I1 are of heat of combustion at the level ofthepilot ring' 2I, and complete hydroxylation takes place. The-'combustion'may take place at or above the pilot means for supplyingsecondary airat a level adjacent thetop of the pot, a centralaperturedbaille ringlocateci between the top and bottom of the'pot, and below thelowest of the primary air inlet apertures in the pot wall, a liquid fuelinlet v'member extending into the pot and into the space below saidbaille ring.: said inlet member having a delivery aperture located ingeneral alignment with the axis of the pot and with the aperture of saidbaille and at a level closely adjacent the bottom of the pot, means fordelivering liquid fuel to said fuel inlet member and means for admittingair to the interior of said liquid fuel inlet member for mixture withthe fuel flowing therealong.

- 2. In combination, in a' pot type burner, a

burner POt having a circumferential wall with aplurality of primary airinlet apertures therein,

y means for supplying secondary air at a level adhydroxylated mixturethen receives its secondary air through the apertures IB and is burnedat or It may also happenjthat anveven lower turndown is desired, and insuch event,- .with the structure as shown, it will be understood lthatcombustion may take place at or near the outlet of the downturnedpassage portion I8 This low turndown', of course, is merely obtained bylimiting the flow of fuel to a very low rate, and the small amount offuel so delivered is mixed with the air and completely hydroxylatedbythe comjacent the top of the pot,.a central apertured baille ringlocated between the top and bottom of the pot, and below the lowestofthe primary' air inlet apertures in the pot wall, a liquid fuel inletbustion taking place at or near the downwardly 'y turned end I8 of theinlet Il. l p

Iclaim:

`1. In combination, in a 4pot type burner, Aa burner pot having acircumferential wall with a plurality of primary air inlet aperturestherein,

member extending into the pot and into the space below said baille ring,said inlet member having a' JAMES L. BREESE.

